P06xx OBD2 Trouble Codes
This is the listing of P06xx OBD2 diagnostic trouble codes (DTCs). They all start with P06, e.g., P0603, P0612. The first letter P indicates that they are powertrain related codes, the next two digits 06 indicate they are computer output circuit related codes. The codes below are considered generic because they apply to all makes/models of OBD2 vehicles, although specific diagnosis & repair steps may vary.
P0600-P0699 Trouble Codes - Computer Output Circuit
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| Code(s) | Description |
|---|---|
| P0600 | Serial Communication Link Malfunction |
| P0601 | Internal Control Module Memory Check Sum Error |
| P0602 | Control Module Programming Error |
| P0603 | Internal Control Module Keep Alive Memory (KAM) Error |
| P0604 | Internal Control Module Random Access Memory (RAM) Error |
| P0605 | Internal Control Module Read Only Memory (ROM) Error |
| P0606 | PCM Processor Fault |
| P0607 | Control Module Performance |
| P0608 | Control Module VSS Output "A" Malfunction |
| P0609 | Control Module VSS Output "B" Malfunction |
| P060A | Internal Control Module Monitoring Processor Performance |
| P060B | Internal Control Module A/D Processing Performance |
| P060C | Internal Control Module Main Processor Performance |
| P060D | Internal Control Module Accelerator Pedal Position Performance |
| P060E | Internal Control Module Throttle Position Performance |
| P060F | Internal Control Module Coolant Temperature Performance |
| P0610 | Control Module Vehicle Options Error |
| P0611 | Fuel Injector Control Module Performance |
| P0612 | Fuel Injector Control Module Relay Control |
| P0613 | TCM Processor |
| P0614 | ECM / TCM Incompatible |
| P0615 | Starter Relay Circuit |
| P0616 | Starter Relay Circuit Low |
| P0617 | Starter Relay Circuit High |
| P0618 | Alternative Fuel Control Module KAM Error |
| P0619 | Alternative Fuel Control Module RAM/ROM Error |
| P061A | Internal Control Module Torque Performance |
| P061B | Internal Control Module Torque Calculation Performance |
| P061C | Internal Control Module Engine RPM Performance |
| P061D | Internal Control Module Engine Air Mass Performance |
| P061E | Internal Control Module Brake Signal Performance |
| P061F | Internal Control Module Throttle Actuator Controller Performance |
| P0620 | Generator Control Circuit Malfunction |
| P0621 | Generator Lamp "L" Control Circuit Malfunction |
| P0622 | Generator Field "F" Control Circuit Malfunction |
| P0623 | Generator Lamp Control Circuit |
| P0624 | Fuel Cap Lamp Control Circuit |
| P0625 | Generator Field/F Terminal Circuit Low |
| P0626 | Generator Field/F Terminal Circuit High |
| P0627 | Fuel Pump "A" Control Circuit /Open |
| P0628 | Fuel Pump "A" Control Circuit Low |
| P0629 | Fuel Pump "A" Control Circuit High |
| P062A | Fuel Pump "A" Control Circuit Range/Performance |
| P062B | Internal Control Module Fuel Injector Control Performance |
| P062C | Internal Control Module Vehicle Speed Performance |
| P062D | Fuel Injector Driver Circuit Performance Bank 1 |
| P062E | Fuel Injector Driver Circuit Performance Bank 2 |
| P062F | Internal Control Module EEPROM Error |
| P0630 | VIN Not Programmed or Incompatible – ECM/PCM |
| P0631 | VIN Not Programmed or Incompatible – TCM |
| P0632 | Odometer Not Programmed – ECM/PCM |
| P0633 | Immobilizer Key Not Programmed – ECM/PCM |
| P0634 | PCM/ECM/TCM Internal Temperature Too High |
| P0635 | Power Steering Control Circuit |
| P0636 | Power Steering Control Circuit Low |
| P0637 | Power Steering Control Circuit High |
| P0638 | Throttle Actuator Control Range/Performance (Bank 1) |
| P0639 | Throttle Actuator Control Range/Performance (Bank 2) |
| P063A | Generator Voltage Sense Circuit |
| P063B | Generator Voltage Sense Circuit Range/Performance |
| P063C | Generator Voltage Sense Circuit Low |
| P063D | Generator Voltage Sense Circuit High |
| P063E | Auto Configuration Throttle Input Not Present |
| P063F | Auto Configuration Engine Coolant Temperature Input Not Present |
| P0640 | Intake Air Heater Control Circuit |
| P0641 | Sensor Reference Voltage "A" Circuit Open |
| P0642 | Sensor Reference Voltage "A" Circuit Low |
| P0643 | Sensor Reference Voltage "A" Circuit High |
| P0644 | Driver Display Serial Communication Circuit |
| P0645 | A/C Clutch Relay Control Circuit |
| P0646 | A/C Clutch Relay Control Circuit Low |
| P0647 | A/C Clutch Relay Control Circuit High |
| P0648 | Immobilizer Lamp Control Circuit |
| P0649 | Speed Control Lamp Control Circuit |
| P064A | Fuel Pump Control Module |
| P064B | PTO Control Module |
| P064C | Glow Plug Control Module |
| P064D | Internal Control Module O2 Sensor Processor Performance Bank 1 |
| P064E | Internal Control Module O2 Sensor Processor Performance Bank 2 |
| P064F | Unauthorized Software/Calibration Detected |
| P0650 | Malfunction Indicator Lamp (MIL) Control Circuit Malfunction |
| P0651 | Sensor Reference Voltage "B" Circuit Open |
| P0652 | Sensor Reference Voltage "B" Circuit Low |
| P0653 | Sensor Reference Voltage "B" Circuit High |
| P0654 | Engine RPM Output Circuit Malfunction |
| P0655 | Engine Hot Lamp Output Control Circuit Malfunction |
| P0656 | Fuel Level Output Circuit Malfunction |
| P0657 | Actuator Supply Voltage "A" Circuit/Open |
| P0658 | Actuator Supply Voltage "A" Circuit Low |
| P0659 | Actuator Supply Voltage "A" Circuit High |
| P065A | Generator System Performance |
| P065B | Generator Control Circuit Range/Performance |
| P065C | Generator Mechanical Performance |
| P065D | Reductant System Malfunction Lamp Control Circuit |
| P065E | Intake Manifold Tuning Valve Performance Bank 1 |
| P065F | Intake Manifold Tuning Valve Performance Bank 2 |
| P0660 | Intake Manifold Tuning Valve Control Circuit/Open Bank 1 |
| P0661 | Intake Manifold Tuning Valve Control Circuit Low Bank 1 |
| P0662 | Intake Manifold Tuning Valve Control Circuit High Bank 1 |
| P0663 | Intake Manifold Tuning Valve Control Circuit/Open Bank 2 |
| P0664 | Intake Manifold Tuning Valve Control Circuit Low Bank 2 |
| P0665 | Intake Manifold Tuning Valve Control Circuit High Bank 2 |
| P0666 | PCM/ECM/TCM Internal Temperature Sensor Circuit |
| P0667 | PCM/ECM/TCM Internal Temperature Sensor Range/Performance |
| P0668 | PCM/ECM/TCM Internal Temperature Sensor Circuit Low |
| P0669 | PCM/ECM/TCM Internal Temperature Sensor Circuit High |
| P066A | Cylinder 1 Glow Plug Control Circuit Low |
| P066B | Cylinder 1 Glow Plug Control Circuit High |
| P066C | Cylinder 2 Glow Plug Control Circuit Low |
| P066D | Cylinder 2 Glow Plug Control Circuit High |
| P066E | Cylinder 3 Glow Plug Control Circuit Low |
| P066F | Cylinder 3 Glow Plug Control Circuit High |
| P0670 | Glow Plug Module Control Circuit |
| P0671 | Cylinder 1 Glow Plug Circuit |
| P0672 | Cylinder 2 Glow Plug Circuit |
| P0673 | Cylinder 3 Glow Plug Circuit |
| P0674 | Cylinder 4 Glow Plug Circuit |
| P0675 | Cylinder 5 Glow Plug Circuit |
| P0676 | Cylinder 6 Glow Plug Circuit |
| P0677 | Cylinder 7 Glow Plug Circuit |
| P0678 | Cylinder 8 Glow Plug Circuit |
| P0679 | Cylinder 9 Glow Plug Circuit |
| P067A | Cylinder 4 Glow Plug Control Circuit Low |
| P067B | Cylinder 4 Glow Plug Control Circuit High |
| P067C | Cylinder 5 Glow Plug Control Circuit Low |
| P067D | Cylinder 5 Glow Plug Control Circuit High |
| P067E | Cylinder 6 Glow Plug Control Circuit Low |
| P067F | Cylinder 6 Glow Plug Control Circuit High |
| P0680 | Cylinder 10 Glow Plug Circuit |
| P0681 | Cylinder 11 Glow Plug Circuit |
| P0682 | Cylinder 12 Glow Plug Circuit |
| P0683 | Glow Plug Control Module to PCM Communication Circuit |
| P0684 | Glow Plug Control Module to PCM Communication Circuit Range/Performance |
| P0685 | ECM/PCM Power Relay Control Circuit Open |
| P0686 | ECM/PCM Power Relay Control Circuit Low |
| P0687 | ECM/PCM Power Relay Control Circuit High |
| P0688 | ECM/PCM Power Relay Sense Circuit Open |
| P0689 | ECM/PCM Power Relay Sense Circuit Low |
| P068A | ECM/PCM Power Relay De-Energized Performance - Too Early |
| P068B | ECM/PCM Power Relay De-Energized Performance - Too Late |
| P068C | Cylinder 7 Glow Plug Control Circuit Low |
| P068D | Cylinder 7 Glow Plug Control Circuit High |
| P068E | Cylinder 8 Glow Plug Control Circuit Low |
| P068F | Cylinder 8 Glow Plug Control Circuit High |
| P0690 | ECM/PCM Power Relay Sense Circuit High |
| P0691 | Fan 1 Control Circuit Low |
| P0692 | Fan 1 Control Circuit High |
| P0693 | Fan 2 Control Circuit Low |
| P0694 | Fan 2 Control Circuit High |
| P0695 | Fan 3 Control Circuit Low |
| P0696 | Fan 3 Control Circuit High |
| P0697 | Sensor Reference Voltage "C" Circuit Open |
| P0698 | Sensor Reference Voltage "C" Circuit Low |
| P0699 | Sensor Reference Voltage "C" Circuit High |
| P069A | Cylinder 9 Glow Plug Control Circuit Low |
| P069B | Cylinder 9 Glow Plug Control Circuit High |
| P069C | Cylinder 10 Glow Plug Control Circuit Low |
| P069D | Cylinder 10 Glow Plug Control Circuit High |
| P069E | Fuel Pump Control Module Requested MIL Illumination |
| P069F | Throttle Actuator Control Lamp Control Circuit |
| P06A0 | Variable A/C Compressor Control Circuit |
| P06A1 | Variable A/C Compressor Control Circuit Low |
| P06A2 | Variable A/C Compressor Control Circuit High |
| P06A3 | Sensor Reference Voltage "D" Circuit Open |
| P06A4 | Sensor Reference Voltage "D" Circuit Low |
| P06A5 | Sensor Reference Voltage "D" Circuit High |
| P06A6 | Sensor Reference Voltage "A" Circuit Range/Performance |
| P06A7 | Sensor Reference Voltage "B" Circuit Range/Performance |
| P06A8 | Sensor Reference Voltage "C" Circuit Range/Performance |
| P06A9 | Sensor Reference Voltage "D" Circuit Range/Performance |
| P06AA | PCM/ECM/TCM Internal Temperature "B" Too High |
| P06AB | PCM/ECM/TCM Internal Temperature Sensor "B" Circuit |
| P06AC | PCM/ECM/TCM Internal Temperature Sensor "B" Range/Performance |
| P06AD | PCM/ECM/TCM Internal Temperature Sensor "B" Circuit Low |
| P06AE | PCM/ECM/TCM Internal Temperature Sensor "B" Circuit High |
| P06AF | Torque Management System - Forced Engine Shutdown |
| P06B0 | Sensor Power Supply "A" Circuit/Open |
| P06B1 | Sensor Power Supply "A" Circuit Low |
| P06B2 | Sensor Power Supply "A" Circuit High |
| P06B3 | Sensor Power Supply "B" Circuit/Open |
| P06B4 | Sensor Power Supply "B" Circuit Low |
| P06B5 | Sensor Power Supply "B" Circuit High |
| P06B6 | Internal Control Module Knock Sensor Processor 1 Performance |
| P06B7 | Internal Control Module Knock Sensor Processor 2 Performance |
| P06B8 | Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error |
| P06B9 | Cylinder 1 Glow Plug Circuit Range/Performance |
| P06BA | Cylinder 2 Glow Plug Circuit Range/Performance |
| P06BB | Cylinder 3 Glow Plug Circuit Range/Performance |
| P06BC | Cylinder 4 Glow Plug Circuit Range/Performance |
| P06BD | Cylinder 5 Glow Plug Circuit Range/Performance |
| P06BE | Cylinder 6 Glow Plug Circuit Range/Performance |
| P06BF | Cylinder 7 Glow Plug Circuit Range/Performance |
| P06C0 | Cylinder 8 Glow Plug Circuit Range/Performance |
| P06C1 | Cylinder 9 Glow Plug Circuit Range/Performance |
| P06C2 | Cylinder 10 Glow Plug Circuit Range/Performance |
| P06C3 | Cylinder 11 Glow Plug Circuit Range/Performance |
| P06C4 | Cylinder 12 Glow Plug Circuit Range/Performance |
| P06C5 | Cylinder 1 Glow Plug Incorrect |
| P06C6 | Cylinder 2 Glow Plug Incorrect |
| P06C7 | Cylinder 3 Glow Plug Incorrect |
| P06C8 | Cylinder 4 Glow Plug Incorrect |
| P06C9 | Cylinder 5 Glow Plug Incorrect |
| P06CA | Cylinder 6 Glow Plug Incorrect |
| P06CB | Cylinder 7 Glow Plug Incorrect |
| P06CC | Cylinder 8 Glow Plug Incorrect |
| P06CD | Cylinder 9 Glow Plug Incorrect |
| P06CE | Cylinder 10 Glow Plug Incorrect |
| P06CF | Cylinder 11 Glow Plug Incorrect |
| P06D0 | Cylinder 12 Glow Plug Incorrect |
| P06D1 | Internal Control Module Ignition Coil Control Performance |
| P06D2 - P06FF | ISO/SAE Reserved |